Hurricane per

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Hurricane Per , also called Storm Per , or January Storm 2007 , was a severe depression that hit Götaland and Svealand on Sunday January 14, 2007 . Blekinge , Halland , Småland , Västra Götaland , Östergötland , Öland and Gotland were affected by the strongest winds. Skåne and Södermanland not to a lesser extent. To a certain extent also Värmland , Närke , Västmanland and Uppland .

Hurricane gusts were measured on the coasts of the Skagerrak and Kattegatt, on Vänern , on the Baltic Sea with Hanö and south of Roslagen in the north. Squalls were also recorded in the entire hinterland, although not at every measuring station. According to the Swedish Meteorological Institute, the highest measured wind speed was 144 km / h on Hanö .

Damage and Consequences

Three people died from falling trees due to the high wind speeds. In two cases these people were sitting in a car, the third dead was an eight-year-old boy from Motala who rode a moped with his father. Two other people died while cleaning up on January 15, one in Vimmerby and another on Öland .

Around 280,000 households were without electricity as of 10 p.m. on Sunday. The reason given by the three largest electricity suppliers in Sweden was the storm and the bad weather that followed. Some of the households had to do without electricity for more than a week. Another reason is the overhead power lines, especially in rural areas. Trees regularly fall into these during storms and tear them apart.

As of Sunday at 2.30 p.m., around 37,000 people in western and southern Sweden had to get along without a telephone, according to Telia . On Monday evening there were already 60–70,000 households without a telephone. The cellular network experienced severe disruptions during the storm and in the days after.

At that time, the Railway Authority and the Swedish Railways announced that all rail traffic in western Sweden was suspended on Sunday. With the exception of the “ Western Main Line” railway line in southern Sweden and the Nässjö – Falköping ( Jönköpingsbanan ) line, as the risk of continuing rail traffic on the affected lines was too great. From the afternoon of January 14, the train service was in the districts of West Götaland , Skåne , Halland and County Kronoberg restored as far as possible. In Skåne , train traffic over the Öresund Bridge was able to be maintained throughout the duration of the storm. There was no replacement bus service for the entire Sunday. Many rail connections were still disrupted on Monday, but the rail replacement service slowly began to function.

Preliminary estimates the day after the storm assumed that around 16 million cubic meters of forest had been felled by the storm. When exact figures were later available, these estimates turned out to be fairly accurate.

Naming

The Norwegian Meteorological Institute was responsible for the naming . They were the first to give the low pressure area the name Per. It was named in the alphabetical order customary there. Per was the ninth storm after hurricane Gudrun . The Swedish Meteorological Institute does not give the storms proper names, but names them according to the month and year in which they occur.

Course of the hurricane

The hurricane caused a low pressure area that moved across Scandinavia. Starting from the North Sea via Norway, Central Sweden and the Baltic Sea. To the south of the center of the depression there were heavy winds in a large area. The center of the low pressure area moved over Norway in the greater Bergen area on the night of January 13-14 . The lowest measured air pressure was 965 hPa . The center of the storm then moved over Sweden. It made its way over northern Värmland with a pressure of 972 hPa and further over Dalarna and Uppland . The strong winds hit western Sweden on the morning of January 14th. In the morning the wind blew with hurricane force in gusts and with an average speed of 26-27 m / s . During the day the storm area moved across southern Sweden and approached the east coast in the evening. A precipitation area circled around the center of the low pressure area. First there was rain east of the low pressure area and later also snow in the north and west, this mainly affected the eastern Svealand and the southern Norrland .

Comparison with the hurricane Gudrun

Basically, one can say that hurricane Gudrun caused greater damage than Per. 16 million cubic meters of forest were destroyed by Per. Through Gudrun about 75 million cubic meters. So about six times more. Because of Gudrun, the condition of the forest floor also deteriorated due to the frost prevailing at that time . So Per was overall weaker than Hurricane Gudrun, with an average of 2–4 m / s less wind gusts. But there were also local differences. In northern Götaland Per was as strong or even stronger than Gudrun, while Gudrun was much more pronounced in central and southern Götaland. Per also had more closely spaced isobars . The isobars are an indication of the strength of the prevailing winds.

The gravure webs by Per and Gudrun are very similar. Both formed west of the British Isles and moved across the southern Norwegian highlands. After Per had passed Sweden, he withdrew via Estonia , while Gudrun moved more in a northerly direction via Karelia .

Others

Web links

SMHI fact sheet no. 33 2007 for download as PDF

Individual evidence

  1. ↑ a b Eva Edquist: Januaristormen 2007. In: Faktablad nr 33. SMHI , May 2007, p 2 , accessed on 21 June 2013 (Swedish).
  2. ↑ a b c Eva Edquist: Januaristormen 2007. In: Faktablad nr 33. SMHI , May 2007, pp 1 , accessed on 21 June 2013 (Swedish).
  3. ↑ Hurricane Per rages in Sweden - 200,000 people without electricity . Radio Sweden, News , Archive, January 15, 2007.
  4. ↑ Report of the Swedish Energy Agency ( Memento of the original from October 30, 2013 in the Internet Archive ) Info: The @1@ 2Template: Webachiv / IABot / energimyndigheten.se archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. (PDF; 2.2 MB) . Final report on the hurricane Per page 75. Point 6.9.2
  5. ↑ Eva Edquist: Januaristormen 2007. In: Faktablad nr 33. SMHI , May 2007, p 4 , accessed on 21 June 2013 (Swedish).
  6. ↑ Eva Edquist: Januaristormen 2007. In: Faktablad nr 33. SMHI , May 2007, page 5 , accessed on 21 June 2013 (Swedish).
  7. ↑ a b Eva Edquist: Januaristormen 2007. In: Faktablad nr 33. SMHI , May 2007, p. 3 , accessed on June 21, 2013 (Swedish).